/Engine/Source/Runtime/Engine/Public/WorldPartition/ContentBundle/ContentBundlePaths.h
InContentBundleExternalActorPackagePath format is : /{MountPoint}/{ExternalActorFolder}/{ContentBundleFolder}/{ContentBundleUID}/{LevelPath}/{ExternalActorPackagePath} return format is /{LevelPath}/{ExternalActorPackagePath}, empty otherwise
namespace ContentBundlePaths { FStringView ContentBundlePaths::GetRelativeExternalActorPackagePath ( FStringView InContentBundleExternalActorPackagePath ) }